US5919246A - Target input for navigation system - Google Patents
Target input for navigation system Download PDFInfo
- Publication number
- US5919246A US5919246A US08/817,319 US81731997A US5919246A US 5919246 A US5919246 A US 5919246A US 81731997 A US81731997 A US 81731997A US 5919246 A US5919246 A US 5919246A
- Authority
- US
- United States
- Prior art keywords
- route
- target position
- stored
- memory
- vehicle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
- G08G1/096805—Systems involving transmission of navigation instructions to the vehicle where the transmitted instructions are used to compute a route
- G08G1/096827—Systems involving transmission of navigation instructions to the vehicle where the transmitted instructions are used to compute a route where the route is computed onboard
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
- G01C21/34—Route searching; Route guidance
- G01C21/36—Input/output arrangements for on-board computers
- G01C21/3605—Destination input or retrieval
- G01C21/3617—Destination input or retrieval using user history, behaviour, conditions or preferences, e.g. predicted or inferred from previous use or current movement
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
- G08G1/096855—Systems involving transmission of navigation instructions to the vehicle where the output is provided in a suitable form to the driver
- G08G1/096872—Systems involving transmission of navigation instructions to the vehicle where the output is provided in a suitable form to the driver where instructions are given per voice
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
- G08G1/096877—Systems involving transmission of navigation instructions to the vehicle where the input to the navigation device is provided by a suitable I/O arrangement
- G08G1/096888—Systems involving transmission of navigation instructions to the vehicle where the input to the navigation device is provided by a suitable I/O arrangement where input information is obtained using learning systems, e.g. history databases
Definitions
- the present invention relates to a process and a device for providing navigational assistance to a driver in reaching a target position with a vehicle. More particularly to a process in which the current local position of the vehicle is identified, a route is determined and current travel tips for the route are obtained from a traffic computer, which is disposed outside of the vehicle, and are displayed to the driver.
- Vehicle guidance and navigation systems especially off-board navigation systems, having optical and/or acoustical output devices for travel tips to guide a vehicle driver along a determined route to a preestablished target destination are known.
- These systems are used, for example, to display information based on digitalized road maps, which are stored in or outside of the vehicle, to drivers unfamiliar with an area. This information concerns, for example, the current geographical position, the route and the impending directional changes.
- the desired target position is input manually and the current geographical position is determined by a position-finding system installed in the vehicle.
- the target position and the current geographical position are then transmitted to an off-board navigation system, which determines a route on the basis of a digital road map, taking into account current traffic information.
- this route is transmitted by the off-board navigation system to the vehicle and shown on a display, highlighted by means of color, for example, using simple arrows or directional symbols.
- the object of the present invention is to provide a process for fully automatic navigational assistance, especially for frequently repeated routine trips, in which the driver's input is minimized.
- the navigational assistance is to be operative, in particular, during traffic jams, short-term detours, etc.
- one aspect of the present invention resides in a process for providing navigational assistance to a vehicle driver in reaching a target position in a vehicle, which process includes the steps of identifying a current local position, determining a route, deriving the target position automatically according to probability by comparing stored historical travel information with current travel information, obtaining current travel tips for the route from a traffic computer disposed outside the vehicle, and relaying the tips to the driver.
- a device for providing navigational assistance to a vehicle driver in reaching a target position which device includes local position finding means for detecting a current local position, route finding means, communication means for exchanging data with a traffic computer disposed outside the vehicle, and means for relaying travel tips to the vehicle driver.
- the route finding means includes a target position derivation device operative to automatically drive the target position, according to probability, based on stored historical travel information.
- the target position is determined automatically, based on probability, by comparing stored travel information from the past with current travel information.
- Navigational assistance that automatically identifies targets in this manner can assist drivers during many trips without requiring them to input their target destinations into the system.
- the invention starts from the realization that it is during frequently repeated trips, in particular, that most drivers will find it burdensome to input their familiar targets for the sake of learning about traffic jams, etc., along their usual route.
- routine trips always involve the same route makes it possible, using stored travel information from the past, to derive the target position and thus the route from the initial course and/or the current time data.
- the navigation system advantageously allows travel tips to be displayed only in cases of slowdowns or obstacles to the traffic flow, e.g., traffic jams. If no obstacles are present, this fact can also be displayed to the driver.
- the invention proposes that the current local position of the vehicle be detected continuously and stored in a user memory, and that the target position be determined on the basis of the current local positions stored during the first phase of a trip.
- the target position and then the route are derived from the initial course of the current route; in other words, the route that the vehicle will have travelled at the end of its journey is predicted.
- the target position and thus the route are determined on the basis of chronological data, including the time of day that the trip begins.
- This method is especially advantageous in the case of trips that regularly begin at the same time each day, e.g., the daily drive to work, because in such cases it is more probable that the target destination can be derived from the starting time of the trip, once the appropriate past chronological data, together with the route, are collected and stored.
- Especially reliable predictions can be achieved when the target position is determined using geographical data as well as chronological data about past travel.
- these stored current local positions are compared with a standard route memory, in which are stored standard routes travelled in the past. If the stored current local positions correspond to a particular initial segment of a route in the standard route memory, the target position and standard route in question are derived (identified) as the current route.
- agreement with a route or segment in the standard route memory be assumed only when that agreement exists at a predetermined level of statistical certainty. A value of 95%, for example, can be established for this.
- the stored current local positions are automatically stored at the end of each trip in an intermediate route memory for a predetermined period of time.
- a route is transferred from the intermediate route memory to the standard route memory when the frequency with which the route is found in the intermediate route memory exceeds a predetermined value.
- routes stored in the intermediate route memory are deleted after a predetermined period of time or after being transferred into the standard route memory.
- the standard routes be stored together with chronological data, which preferably include the time of day and the day of the week.
- chronological data preferably include the time of day and the day of the week.
- the target position is determined by calculating programs that are run on a computer mounted in the vehicle.
- a preferred navigational assistance device has a local position-finding device, which can be used to find the current local position. Furthermore, the navigational assistance device has a route finding device, which in turn is equipped with a device to derive the target position, based on probability, from stored historical travel information. The route-finding device is connected to a communication device, which is used to obtain current travel tips from a traffic computer disposed outside of the vehicle. The travel tips are shown on a display device installed in the vehicle. The navigational assistance device ensures that in the event of traffic jams, etc., the driver will receive travel tips for his route even during routine trips, when, as a rule, he will not have input his target position.
- the invention proposes that the current local position be continuously detectable by the location-finding device and that a user memory be provided to store the continuously detected current local positions.
- the target position can be derived by the target position derivation device, which has stored decision criteria at its disposal, from the current local positions stored up to that point, i.e., from the initial course of the current route.
- the travel data includes chronological data, which include, at least, the time that the trip begins, and the target position can be derived by the target position derivation device from the chronological data.
- the target position derivation device has a standard route memory, in which standard routes are stored in the form of consecutive local positions, as well as a comparison device, which compares the stored current local positions with the standard routes in the standard route memory for the purpose of determining the target position.
- an intermediate route memory in which the stored current local positions can be automatically stored at the end of each trip.
- a transfer device is also provided, which permits routes to be transferred from the intermediate route memory into the standard route memory when the frequency with which a given route is travelled exceeds a predetermined value.
- the frequency relates to a predetermined period of time, preferably in the immediate past.
- the target position derivation device is a calculating program that is stored in the user memory of the on-board computer and has at least one statistical computing algorithm.
- the communication device for exchanging data with the external traffic computer is preferably embodied as a mobile phone.
- the vehicle navigation system shown schematically in the drawing comprises an external system unit and a system unit located in the vehicle.
- the system unit in the vehicle has a communication device 1, by means of which data can be transmitted to the external system unit.
- the communication device 1 is connected to an on-board computer 2, which is provided in the vehicle and used to control the vehicle-internal devices.
- the on-board computer 2 is connected to a display device 3, which displays the travel tips for the driver.
- the tips can be provided optically and, in addition, acoustically, particularly in the form of a voice output.
- GPS Global Positioning System
- the GPS receiver 4 is connected via the on-board computer 2 to a working memory 5, in which the detected local position data can be stored, together with the corresponding chronological data, especially the time of day at which a trip begins.
- a route-finding device 6 that is connected to the on-board computer 2.
- the route-finding device in turn has a target position derivation device 7.
- the target position derivation device 7 comprises a route comparison device 8, which can access the stored current local positions in the working memory 5 and has typical routes stored in a standard route memory 9.
- the standard route memory 9 can also be located outside of the vehicle, especially when the standard routes belong to an organized entity, e.g., a bus company.
- the route comparison device 8 permits the current route to be compared with the routes stored in the standard route memory 9. On this basis, the actual current travel objective (target position) of the vehicle can be predicted.
- the route finding device 6 is connected to the communication device 1 in such a way that a control signal 10 can cause current travel tips for the route to the current target position to be obtained by the communications device 1.
- the stored current local positions can be stored in an intermediate route memory 11, which is connected to the on-board computer 2.
- the intermediate route memory 11 is connected to the standard route memory 9 by a transfer device 12.
- the transfer device 12 permits travel routes to be transferred from the intermediate route memory 11 into the standard route memory 9 when the frequency with which a route is travelled during a given past period of time exceeds a certain value, which is preestablished or can be established by the driver.
- the transfer device 12 thus permits all routes stored in the intermediate route memory 11 to be compared with one another. In this way, the frequency with which a given route occurs in the intermediate route memory 11 can be determined.
- the routes stored in the intermediate route memory 11 preferably include chronological data, especially the time of day, the day of the week and the month that the travel route in question began.
- a suitable updating algorithm can be used to update the intermediate route memory 11. The updating algorithm deletes all those routes stored in the intermediate route memory 11 whose times fall outside a predetermined time period.
- the current local positions are continuously detected, once the vehicle starts, with the help of the GPS receiver 4 and the on-board computer 2.
- the positions are stored in the memory 5 as the stored current local positions.
- the target position and thus the route presumably desired by the driver are determined by the route finding device 6 from the current route travelled up to the given point in time.
- the target position derivation device 7 is asked by the route comparison device 8 at brief time intervals to compare the stored current local positions with the routes in the standard route memory 9.
- a standard route stored in the standard route memory 9 will be identified as the current route if the latter corresponds to at least one segment of the route stored in the standard route memory 9 with a predetermined statistical certainty.
- a value of at least 95% is provided for the predetermined statistical certainty; alternatively, by pressing a button or the like, the user may tell the system that the route currently being travelled is a standard one. This allows the number of erroneous identifications to be further reduced.
- a control signal 10 is sent from the route finding device 6, whereupon the communication device 1 obtains traffic information on this current route from the traffic computer 22 via a transmitter/receiver 21. After receiving such a request, the traffic computer 22 transmits current travel tips and/or a current alternative route to the vehicle obtains from a digital road map 23.
- the standard routes are determined as follows: After a trip ends, the stored current local positions are stored in the intermediate route memory 11.
- the routes stored in the intermediate route memory 11 are transferred by the transfer device 12 into the standard route memory 9 when a route is present in the intermediate route memory 11 more frequently than a given number of times.
- the routes in the intermediate route memory 11 are deleted after being transferred into the standard route memory 9. Deletion also occurs when the chronological data for a route stored in the intermediate route memory 11 lie outside of a given time period. Routes in the standard route memory 9 are also deleted when the chronological data (for the most recent trip) lie outside of a preestablished period of time. As a rule, this period of time is longer than the period of time for deletion of routes in the intermediate route memory 11.
- the semi-automatic determination of standard routes is also conceivable.
- the driver of a vehicle tells the on-board computer, e.g., by pressing a button, that the stored current local positions apply to a new standard route.
- the on-board computer then stores this route directly in the standard route memory 9. No intermediate route memory 11 is required in this embodiment of the invention.
- the target position derivation device 7 can be designed in the form of a statistical computing algorithm, by means of which a computer, taking into account random deviations, can determine the current route from data on the current local positions.
- control signal 10 can advantageously be generated by a suitable computing program, working together with a suitable hardware device.
- target position and route described here which is essentially based on stored current local positions, could also be carried out by taking into account the current chronological data or by using such data exclusively. Particularly in the case of routine trips that always occur at the same time, highly reliable conclusions about the current target position and route can be drawn from the chronological data.
Abstract
Description
Claims (23)
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4436992 | 1994-10-07 | ||
DE4436992 | 1994-10-07 | ||
DE19535576A DE19535576A1 (en) | 1994-10-07 | 1995-09-14 | Method and device for route guidance support |
DE19535576 | 1995-09-14 | ||
PCT/DE1995/001414 WO1996011380A1 (en) | 1994-10-07 | 1995-10-05 | Target input for a navigation system |
Publications (1)
Publication Number | Publication Date |
---|---|
US5919246A true US5919246A (en) | 1999-07-06 |
Family
ID=25941104
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/817,319 Expired - Lifetime US5919246A (en) | 1994-10-07 | 1995-10-05 | Target input for navigation system |
Country Status (7)
Country | Link |
---|---|
US (1) | US5919246A (en) |
EP (1) | EP0805951B1 (en) |
AT (1) | ATE189056T1 (en) |
AU (1) | AU3696895A (en) |
ES (1) | ES2140713T3 (en) |
FI (1) | FI971419A0 (en) |
WO (1) | WO1996011380A1 (en) |
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Also Published As
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WO1996011380A1 (en) | 1996-04-18 |
FI971419A (en) | 1997-04-04 |
EP0805951B1 (en) | 2000-01-19 |
FI971419A0 (en) | 1997-04-04 |
EP0805951A1 (en) | 1997-11-12 |
ES2140713T3 (en) | 2000-03-01 |
AU3696895A (en) | 1996-05-02 |
ATE189056T1 (en) | 2000-02-15 |
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